ref: 29fada7d8c08fb04c9aee9408f6acb3cc44fad51
dir: /engine/battle/battle_transition.asm/
; BattleTransitionJumptable.Jumptable indexes DEF BATTLETRANSITION_CAVE EQU $01 DEF BATTLETRANSITION_CAVE_STRONGER EQU $09 DEF BATTLETRANSITION_NO_CAVE EQU $10 DEF BATTLETRANSITION_NO_CAVE_STRONGER EQU $18 DEF BATTLETRANSITION_FINISH EQU $20 DEF BATTLETRANSITION_END EQU $80 DEF BATTLETRANSITION_SQUARE EQU "8" ; $fe DEF BATTLETRANSITION_BLACK EQU "9" ; $ff DoBattleTransition: call .InitGFX ldh a, [rBGP] ld [wBGP], a ldh a, [rOBP0] ld [wOBP0], a ldh a, [rOBP1] ld [wOBP1], a call DelayFrame ld hl, hVBlank ld a, [hl] push af vc_hook Reduce_battle_transition_flashing ld [hl], $1 .loop ld a, [wJumptableIndex] bit 7, a ; BATTLETRANSITION_END? jr nz, .done call BattleTransitionJumptable call DelayFrame jr .loop .done ldh a, [rSVBK] push af ld a, BANK(wBGPals1) ldh [rSVBK], a ld hl, wBGPals1 ld bc, 8 palettes xor a call ByteFill pop af ldh [rSVBK], a ld a, %11111111 ld [wBGP], a call DmgToCgbBGPals call DelayFrame xor a ldh [hLCDCPointer], a ldh [hLYOverrideStart], a ldh [hLYOverrideEnd], a ldh [hSCY], a ld a, $1 ; unnecessary bankswitch? ldh [rSVBK], a pop af vc_hook Stop_reducing_battle_transition_flashing ldh [hVBlank], a call DelayFrame ret .InitGFX: ld a, [wLinkMode] cp LINK_MOBILE jr z, .mobile farcall ReanchorBGMap_NoOAMUpdate call UpdateSprites call DelayFrame call .NonMobile_LoadPokeballTiles call BattleStart_CopyTilemapAtOnce jr .resume .mobile call LoadTrainerBattlePokeballTiles .resume ld a, SCREEN_HEIGHT_PX ldh [hWY], a call DelayFrame xor a ldh [hBGMapMode], a ld hl, wJumptableIndex xor a ld [hli], a ld [hli], a ld [hl], a call WipeLYOverrides ret .NonMobile_LoadPokeballTiles: call LoadTrainerBattlePokeballTiles hlbgcoord 0, 0 call ConvertTrainerBattlePokeballTilesTo2bpp ret LoadTrainerBattlePokeballTiles: ; Load the tiles used in the Pokeball Graphic that fills the screen ; at the start of every Trainer battle. ld de, TrainerBattlePokeballTiles ld hl, vTiles0 tile BATTLETRANSITION_SQUARE ld b, BANK(TrainerBattlePokeballTiles) ld c, 2 call Request2bpp ldh a, [rVBK] push af ld a, $1 ldh [rVBK], a ld de, TrainerBattlePokeballTiles ld hl, vTiles3 tile BATTLETRANSITION_SQUARE ld b, BANK(TrainerBattlePokeballTiles) ld c, 2 call Request2bpp pop af ldh [rVBK], a ret ConvertTrainerBattlePokeballTilesTo2bpp: ldh a, [rSVBK] push af ld a, BANK(wDecompressScratch) ldh [rSVBK], a push hl ld hl, wDecompressScratch ld bc, $28 tiles .loop ld [hl], -1 inc hl dec bc ld a, c or b jr nz, .loop pop hl ld de, wDecompressScratch ld b, BANK(@) ld c, $28 call Request2bpp pop af ldh [rSVBK], a ret TrainerBattlePokeballTiles: INCBIN "gfx/overworld/trainer_battle_pokeball_tiles.2bpp" BattleTransitionJumptable: jumptable .Jumptable, wJumptableIndex .Jumptable: dw StartTrainerBattle_DetermineWhichAnimation ; 00 ; BATTLETRANSITION_CAVE dw StartTrainerBattle_LoadPokeBallGraphics ; 01 dw StartTrainerBattle_SetUpBGMap ; 02 dw StartTrainerBattle_Flash ; 03 dw StartTrainerBattle_Flash ; 04 dw StartTrainerBattle_Flash ; 05 dw StartTrainerBattle_NextScene ; 06 dw StartTrainerBattle_SetUpForWavyOutro ; 07 dw StartTrainerBattle_SineWave ; 08 ; BATTLETRANSITION_CAVE_STRONGER dw StartTrainerBattle_LoadPokeBallGraphics ; 09 dw StartTrainerBattle_SetUpBGMap ; 0a dw StartTrainerBattle_Flash ; 0b dw StartTrainerBattle_Flash ; 0c dw StartTrainerBattle_Flash ; 0d dw StartTrainerBattle_NextScene ; 0e ; There is no setup for this one dw StartTrainerBattle_ZoomToBlack ; 0f ; BATTLETRANSITION_NO_CAVE dw StartTrainerBattle_LoadPokeBallGraphics ; 10 dw StartTrainerBattle_SetUpBGMap ; 11 dw StartTrainerBattle_Flash ; 12 dw StartTrainerBattle_Flash ; 13 dw StartTrainerBattle_Flash ; 14 dw StartTrainerBattle_NextScene ; 15 dw StartTrainerBattle_SetUpForSpinOutro ; 16 dw StartTrainerBattle_SpinToBlack ; 17 ; BATTLETRANSITION_NO_CAVE_STRONGER dw StartTrainerBattle_LoadPokeBallGraphics ; 18 dw StartTrainerBattle_SetUpBGMap ; 19 dw StartTrainerBattle_Flash ; 1a dw StartTrainerBattle_Flash ; 1b dw StartTrainerBattle_Flash ; 1c dw StartTrainerBattle_NextScene ; 1d dw StartTrainerBattle_SetUpForRandomScatterOutro ; 1e dw StartTrainerBattle_SpeckleToBlack ; 1f ; BATTLETRANSITION_FINISH dw StartTrainerBattle_Finish ; 20 ; transition animations const_def const TRANS_CAVE const TRANS_CAVE_STRONGER const TRANS_NO_CAVE const TRANS_NO_CAVE_STRONGER ; transition animation bits DEF TRANS_STRONGER_F EQU 0 ; bit set in TRANS_CAVE_STRONGER and TRANS_NO_CAVE_STRONGER DEF TRANS_NO_CAVE_F EQU 1 ; bit set in TRANS_NO_CAVE and TRANS_NO_CAVE_STRONGER StartTrainerBattle_DetermineWhichAnimation: ; The screen flashes a different number of times depending on the level of ; your lead Pokemon relative to the opponent's. ; BUG: Battle transitions fail to account for enemy's level (see docs/bugs_and_glitches.md) ld de, 0 ld a, [wBattleMonLevel] add 3 ld hl, wEnemyMonLevel cp [hl] jr nc, .not_stronger set TRANS_STRONGER_F, e .not_stronger ld a, [wEnvironment] cp CAVE jr z, .cave cp ENVIRONMENT_5 jr z, .cave cp DUNGEON jr z, .cave set TRANS_NO_CAVE_F, e .cave ld hl, .StartingPoints add hl, de ld a, [hl] ld [wJumptableIndex], a ret .StartingPoints: ; entries correspond to TRANS_* constants db BATTLETRANSITION_CAVE db BATTLETRANSITION_CAVE_STRONGER db BATTLETRANSITION_NO_CAVE db BATTLETRANSITION_NO_CAVE_STRONGER StartTrainerBattle_Finish: call ClearSprites ld a, BATTLETRANSITION_END ld [wJumptableIndex], a ret StartTrainerBattle_NextScene: ld hl, wJumptableIndex inc [hl] ret StartTrainerBattle_SetUpBGMap: call StartTrainerBattle_NextScene xor a ld [wBattleTransitionCounter], a ldh [hBGMapMode], a ret StartTrainerBattle_Flash: call .DoFlashAnimation ret nc call StartTrainerBattle_NextScene ret .DoFlashAnimation: ld a, [wTimeOfDayPalset] cp DARKNESS_PALSET jr z, .done ld hl, wBattleTransitionCounter ld a, [hl] inc [hl] srl a ld e, a ld d, 0 ld hl, .pals add hl, de ld a, [hl] cp %00000001 jr z, .done ld [wBGP], a call DmgToCgbBGPals and a ret .done xor a ld [wBattleTransitionCounter], a scf ret .pals: dc 3, 3, 2, 1 dc 3, 3, 3, 2 dc 3, 3, 3, 3 dc 3, 3, 3, 2 dc 3, 3, 2, 1 dc 3, 2, 1, 0 dc 2, 1, 0, 0 dc 1, 0, 0, 0 dc 0, 0, 0, 0 dc 1, 0, 0, 0 dc 2, 1, 0, 0 dc 3, 2, 1, 0 dc 0, 0, 0, 1 StartTrainerBattle_SetUpForWavyOutro: vc_hook Stop_reducing_battle_transition_flashing_WavyOutro farcall RespawnPlayerAndOpponent ld a, BANK(wLYOverrides) ldh [rSVBK], a call StartTrainerBattle_NextScene ld a, LOW(rSCX) ldh [hLCDCPointer], a xor a ldh [hLYOverrideStart], a ld a, $90 ldh [hLYOverrideEnd], a xor a ld [wBattleTransitionCounter], a ld [wBattleTransitionSineWaveOffset], a ret StartTrainerBattle_SineWave: ld a, [wBattleTransitionCounter] cp $60 jr nc, .end call .DoSineWave ret .end ld a, BATTLETRANSITION_FINISH ld [wJumptableIndex], a ret .DoSineWave: ld hl, wBattleTransitionSineWaveOffset ld a, [hl] inc [hl] ld hl, wBattleTransitionCounter ld d, [hl] add [hl] ld [hl], a ld a, wLYOverridesEnd - wLYOverrides ld bc, wLYOverrides ld e, 0 .loop push af push de ld a, e call StartTrainerBattle_DrawSineWave ld [bc], a inc bc pop de ld a, e add 2 ld e, a pop af dec a jr nz, .loop ret StartTrainerBattle_SetUpForSpinOutro: vc_hook Stop_reducing_battle_transition_flashing_SpinOutro farcall RespawnPlayerAndOpponent ld a, BANK(wLYOverrides) ldh [rSVBK], a call StartTrainerBattle_NextScene xor a ld [wBattleTransitionCounter], a ret StartTrainerBattle_SpinToBlack: xor a ldh [hBGMapMode], a ld a, [wBattleTransitionCounter] ld e, a ld d, 0 ld hl, .spin_quadrants rept 5 add hl, de endr ld a, [hli] cp -1 jr z, .end ld [wBattleTransitionSineWaveOffset], a call .load ld a, 1 ldh [hBGMapMode], a call DelayFrame call DelayFrame ld hl, wBattleTransitionCounter inc [hl] ret .end ld a, 1 ldh [hBGMapMode], a call DelayFrame call DelayFrame call DelayFrame xor a ldh [hBGMapMode], a ld a, BATTLETRANSITION_FINISH ld [wJumptableIndex], a ret ; quadrants const_def const UPPER_LEFT const UPPER_RIGHT const LOWER_LEFT const LOWER_RIGHT ; quadrant bits DEF RIGHT_QUADRANT_F EQU 0 ; bit set in UPPER_RIGHT and LOWER_RIGHT DEF LOWER_QUADRANT_F EQU 1 ; bit set in LOWER_LEFT and LOWER_RIGHT .spin_quadrants: MACRO spin_quadrant db \1 dw \2 dwcoord \3, \4 ENDM spin_quadrant UPPER_LEFT, .wedge1, 1, 6 spin_quadrant UPPER_LEFT, .wedge2, 0, 3 spin_quadrant UPPER_LEFT, .wedge3, 1, 0 spin_quadrant UPPER_LEFT, .wedge4, 5, 0 spin_quadrant UPPER_LEFT, .wedge5, 9, 0 spin_quadrant UPPER_RIGHT, .wedge5, 10, 0 spin_quadrant UPPER_RIGHT, .wedge4, 14, 0 spin_quadrant UPPER_RIGHT, .wedge3, 18, 0 spin_quadrant UPPER_RIGHT, .wedge2, 19, 3 spin_quadrant UPPER_RIGHT, .wedge1, 18, 6 spin_quadrant LOWER_RIGHT, .wedge1, 18, 11 spin_quadrant LOWER_RIGHT, .wedge2, 19, 14 spin_quadrant LOWER_RIGHT, .wedge3, 18, 17 spin_quadrant LOWER_RIGHT, .wedge4, 14, 17 spin_quadrant LOWER_RIGHT, .wedge5, 10, 17 spin_quadrant LOWER_LEFT, .wedge5, 9, 17 spin_quadrant LOWER_LEFT, .wedge4, 5, 17 spin_quadrant LOWER_LEFT, .wedge3, 1, 17 spin_quadrant LOWER_LEFT, .wedge2, 0, 14 spin_quadrant LOWER_LEFT, .wedge1, 1, 11 db -1 .load: ld a, [hli] ld e, a ld a, [hli] ld d, a ld a, [hli] ld h, [hl] ld l, a .loop push hl ld a, [de] ld c, a inc de .loop1 ld [hl], BATTLETRANSITION_BLACK ld a, [wBattleTransitionSineWaveOffset] bit RIGHT_QUADRANT_F, a jr z, .leftside inc hl jr .okay1 .leftside dec hl .okay1 dec c jr nz, .loop1 pop hl ld a, [wBattleTransitionSineWaveOffset] bit LOWER_QUADRANT_F, a ld bc, SCREEN_WIDTH jr z, .upper ld bc, -SCREEN_WIDTH .upper add hl, bc ld a, [de] inc de cp -1 ret z and a jr z, .loop ld c, a .loop2 ld a, [wBattleTransitionSineWaveOffset] bit RIGHT_QUADRANT_F, a jr z, .leftside2 dec hl jr .okay2 .leftside2 inc hl .okay2 dec c jr nz, .loop2 jr .loop .wedge1: db 2, 3, 5, 4, 9, -1 .wedge2: db 1, 1, 2, 2, 4, 2, 4, 2, 3, -1 .wedge3: db 2, 1, 3, 1, 4, 1, 4, 1, 4, 1, 3, 1, 2, 1, 1, 1, 1, -1 .wedge4: db 4, 1, 4, 0, 3, 1, 3, 0, 2, 1, 2, 0, 1, -1 .wedge5: db 4, 0, 3, 0, 3, 0, 2, 0, 2, 0, 1, 0, 1, 0, 1, -1 StartTrainerBattle_SetUpForRandomScatterOutro: vc_hook Stop_reducing_battle_transition_flashing_ScatterOutro farcall RespawnPlayerAndOpponent ld a, BANK(wLYOverrides) ldh [rSVBK], a call StartTrainerBattle_NextScene ld a, $10 ld [wBattleTransitionCounter], a ld a, 1 ldh [hBGMapMode], a ret StartTrainerBattle_SpeckleToBlack: ld hl, wBattleTransitionCounter ld a, [hl] and a jr z, .done dec [hl] ld c, $c .loop push bc call .BlackOutRandomTile pop bc dec c jr nz, .loop ret .done ld a, $1 ldh [hBGMapMode], a call DelayFrame call DelayFrame call DelayFrame xor a ldh [hBGMapMode], a ld a, BATTLETRANSITION_FINISH ld [wJumptableIndex], a ret .BlackOutRandomTile: .y_loop call Random cp SCREEN_HEIGHT jr nc, .y_loop ld b, a .x_loop call Random cp SCREEN_WIDTH jr nc, .x_loop ld c, a hlcoord 0, -1 ld de, SCREEN_WIDTH inc b .row_loop add hl, de dec b jr nz, .row_loop add hl, bc ; If the tile has already been blacked out, ; sample a new tile ld a, [hl] cp BATTLETRANSITION_BLACK jr z, .y_loop ld [hl], BATTLETRANSITION_BLACK ret StartTrainerBattle_LoadPokeBallGraphics: ld a, [wOtherTrainerClass] and a jp z, .nextscene ; don't need to be here if wild xor a ldh [hBGMapMode], a hlcoord 0, 0, wAttrmap ld bc, SCREEN_HEIGHT * SCREEN_WIDTH inc b inc c jr .enter_loop_midway .pal_loop ; set all pals to 7 ld a, [hl] or PAL_BG_TEXT ld [hli], a .enter_loop_midway dec c jr nz, .pal_loop dec b jr nz, .pal_loop call .loadpokeballgfx hlcoord 2, 1 ld b, SCREEN_WIDTH - 4 .tile_loop push hl ld c, 2 .row_loop push hl ld a, [de] inc de .col_loop ; Loading is done bit by bit and a jr z, .done sla a jr nc, .no_load ld [hl], BATTLETRANSITION_SQUARE .no_load inc hl jr .col_loop .done pop hl push bc ld bc, (SCREEN_WIDTH - 4) / 2 add hl, bc pop bc dec c jr nz, .row_loop pop hl push bc ld bc, SCREEN_WIDTH add hl, bc pop bc dec b jr nz, .tile_loop ldh a, [hCGB] and a jr nz, .cgb ld a, 1 ldh [hBGMapMode], a call DelayFrame call DelayFrame jr .nextscene .cgb ld hl, .pals ld a, [wTimeOfDayPal] maskbits NUM_DAYTIMES cp DARKNESS_F jr nz, .not_dark ld hl, .darkpals .not_dark ldh a, [rSVBK] push af ld a, BANK(wBGPals1) ldh [rSVBK], a call .copypals push hl ld de, wBGPals1 palette PAL_BG_TEXT ld bc, 1 palettes call CopyBytes pop hl ld de, wBGPals2 palette PAL_BG_TEXT ld bc, 1 palettes call CopyBytes pop af ldh [rSVBK], a ld a, TRUE ldh [hCGBPalUpdate], a call DelayFrame call BattleStart_CopyTilemapAtOnce .nextscene call StartTrainerBattle_NextScene ret .copypals ld de, wBGPals1 palette PAL_BG_TEXT call .copy ld de, wBGPals2 palette PAL_BG_TEXT call .copy ld de, wOBPals1 palette PAL_OW_TREE call .copy ld de, wOBPals2 palette PAL_OW_TREE call .copy ld de, wOBPals1 palette PAL_OW_ROCK call .copy ld de, wOBPals2 palette PAL_OW_ROCK .copy push hl ld bc, 1 palettes call CopyBytes pop hl ret .pals: INCLUDE "gfx/overworld/trainer_battle.pal" .darkpals: INCLUDE "gfx/overworld/trainer_battle_dark.pal" .loadpokeballgfx: ld a, [wOtherTrainerClass] ld de, PokeBallTransition ret PokeBallTransition: ; 16x16 overlay of a Poke Ball pusho opt b.X ; . = 0, X = 1 bigdw %......XXXX...... bigdw %....XXXXXXXX.... bigdw %..XXXX....XXXX.. bigdw %..XX........XX.. bigdw %.XX..........XX. bigdw %.XX...XXXX...XX. bigdw %XX...XX..XX...XX bigdw %XXXXXX....XXXXXX bigdw %XXXXXX....XXXXXX bigdw %XX...XX..XX...XX bigdw %.XX...XXXX...XX. bigdw %.XX..........XX. bigdw %..XX........XX.. bigdw %..XXXX....XXXX.. bigdw %....XXXXXXXX.... bigdw %......XXXX...... popo WipeLYOverrides: ldh a, [rSVBK] push af ld a, BANK(wLYOverrides) ldh [rSVBK], a ld hl, wLYOverrides call .wipe ld hl, wLYOverridesBackup call .wipe pop af ldh [rSVBK], a ret .wipe xor a ld c, SCREEN_HEIGHT_PX .loop ld [hli], a dec c jr nz, .loop ret StartTrainerBattle_DrawSineWave: calc_sine_wave StartTrainerBattle_ZoomToBlack: vc_hook Stop_reducing_battle_transition_flashing_ZoomToBlack farcall RespawnPlayerAndOpponent ld de, .boxes .loop ld a, [de] cp -1 jr z, .done inc de ld c, a ld a, [de] inc de ld b, a ld a, [de] inc de ld l, a ld a, [de] inc de ld h, a xor a ldh [hBGMapMode], a call .Copy call WaitBGMap jr .loop .done ld a, BATTLETRANSITION_FINISH ld [wJumptableIndex], a ret .boxes MACRO zoombox ; width, height, start y, start x db \1, \2 dwcoord \3, \4 ENDM zoombox 4, 2, 8, 8 zoombox 6, 4, 7, 7 zoombox 8, 6, 6, 6 zoombox 10, 8, 5, 5 zoombox 12, 10, 4, 4 zoombox 14, 12, 3, 3 zoombox 16, 14, 2, 2 zoombox 18, 16, 1, 1 zoombox 20, 18, 0, 0 db -1 .Copy: ld a, BATTLETRANSITION_BLACK .row push bc push hl .col ld [hli], a dec c jr nz, .col pop hl ld bc, SCREEN_WIDTH add hl, bc pop bc dec b jr nz, .row ret UnusedWaitBGMapOnce: ; unreferenced ld a, 1 ldh [hBGMapMode], a ; redundant call WaitBGMap xor a ldh [hBGMapMode], a ret